Offshoreonly.com - exhaust manifolds

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rssteiny

03-13-2006 06:38 AM

exhaust manifolds

anybody out there change there stock 500 hp manifolds to a performance manifold with any good results if so what make and what kind of results. thanks 32 thunder :drink: rick

Griff

03-13-2006 01:44 PM

Re: exhaust manifolds

I went from the stock Merc/Gils to CMI's on my 525SC. I saw no difference in performance.

axapowell

03-13-2006 11:54 PM

Re: exhaust manifolds

Just last month, on the dyno, with a HP500 with AFR heads and a Crane 741 cam, I saw a difference of 25-30 horsepower gain with CMI elbow tops vs. the stock Gil performance manifolds and tails. Also a gain of 35 ftlbs of torque across the board.

Dave

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